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copied!<p>I figured it out. Apparently, if you're creating a content type that is also an ubercart product class, you cannot simply follow the tutorial that I linked to above and then "tack on" ubercart stuff. According to the tutorial above, you need to implement the following hooks to create a content type from within your module:</p> <ul> <li>hook_info()</li> <li>hook_perm()</li> <li>hook_access()</li> <li>hook_form()</li> <li>hook_help()</li> </ul> <p>To create a content type that is also a product class, you need to make the following modifications to the above list:</p> <ul> <li>Remove hook_info(). Not sure why this causes a problem, but it does.</li> <li>Use hook_perm(), hook_access(), hook_form() and hook_help() as usual.</li> <li><p>Use hook_enable() (which fires when the module is enabled), and include the following code:</p> <pre><code>function uc_yourmodule_enable() { db_query("INSERT INTO {uc_product_classes} (pcid, name, description) VALUES ('%s', '%s', '%s')", 'product_class_id', 'Product Class Name', 'Product Class Description.'); node_types_rebuild(); } </code></pre></li> </ul> <p>As you can see, the snippet adds an entry to the uc_product_classes table, and I guess that's all ubercart needs.</p> <p>Finally, I've also implemented an ubercart-specific hook further down in my module: <a href="http://api.ubercart.org/api/function/hook_product_types/2" rel="nofollow noreferrer">hook_product_types()</a></p> <p>I'm just figuring this out as I go along, so I'm happy to receive corrections or suggestions.</p>

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